<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>sessionStorage</title>
</head>

<body>
    <h2>sessionStorage</h2>
    <button onclick="saveData()">点我保存一个数据</button>
    <button onclick="readData()">点我读取一个数据</button>
    <button onclick="deleteData()">点我删除一个数据</button>

    <script type="text/javascript">

        let p = { name: '张三', age: 18 }
        function saveData() {
            window.sessionStorage.setItem('msg', 'hello')
            window.sessionStorage.setItem('msg2', 666)
            window.sessionStorage.setItem('person',JSON.stringify(p))
        }

        function readData(){
            console.log(sessionStorage.getItem('person1')) 
        }

        function deleteData(){
            sessionStorage.removeItem('msg2')
            
        }
    </script>
</body>

</html>